Update account and sync management UX

components/sync_ui_strings.grdp

Index: components/sync_ui_strings.grdp
diff --git a/components/sync_ui_strings.grdp b/components/sync_ui_strings.grdp
index 77d6608d31473c3beeae29efb6f98b191e28cf6f..047660357ec23d4f1184c2b88a6b48ebf7c94d52 100644
--- a/components/sync_ui_strings.grdp
+++ b/components/sync_ui_strings.grdp
@@ -51,9 +51,9 @@
     </message>
   </if>
   <message name="IDS_SYNC_ENTER_PASSPHRASE_BODY_WITH_DATE" desc="Instructions for the dialog where the user enters the passphrase.">
-    Your data was encrypted with your sync passphrase on <ph name="TIME">$1<ex>Sept 1, 2012</ex></ph>. Please enter it below.
+    Your data was encrypted with a sync passphrase on <ph name="TIME">$1<ex>Sept 1, 2012</ex></ph>. Enter it to start sync.
   </message>
   <message name="IDS_SYNC_ENTER_PASSPHRASE_BODY" desc="Instructions for the dialog where the user enters the passphrase.">
-    Your data is encrypted with your sync passphrase. Please enter it below.
+    Your data is encrypted with your sync passphrase. Enter it to start sync.

[newt (away), 2016/02/12 22:03:51]

s/your sync passphrase/a sync passphrase/ ?

[May, 2016/02/16 17:32:08]

Mocks say "your sync passphrase":
https://folio.googleplex.com/chrome-ux/mocks/332-mobile-accounts/accounts/1#%...

   </message>
 </grit-part>